Coquina Baywalk
See more photos from Coquina Baywalk. Explore Leffis Key on a series of trails and boardwalks through mangrove tunnels on the Coquina Baywalk. A unspoiled sliver between the Gulf of Mexico and Sarasota Bay, Leffis Key sits between Bradenton Beach and Longboat Key. Although the entire trail system is less than a mile, it's fun to explore.